A large university is interested in learning about the average time it takes students to drive to campus. The university sampled 238 students and asked each to provide the amount of time they
Spent traveling to campus. This variable, travel time, was then used conduct a test of hypothesis.
The goal was to determine if the average travel time of all the universityʹs students differed from
20 minutes. Suppose the sample mean and sample standard deviation were calculated to be 23.2
And 20.26 minutes, respectively. Calculate the value of the test statistic to be used in the test.
A)z = 2.437
B)z = 0.173
C)z = 2.551
D)z = 37.59

Question

Quizplus · Accepted Answer

The test statistic is calculated using the formula: z = (sample mean - population mean) / (sample standard deviation / sqrt(sample size)). Plugging in the values: z = (23.2 - 20) / (20.26 / sqrt(238)) = 2.437.

A Large University Is Interested in Learning About the Average